x86: Add high bit-depth ipred z3 AVX-512 (Ice Lake) asm
Ice Lake Zen 4
intra_pred_z3_w4_16bpc_avx2: 30.1 ( 6.07x) 25.0 ( 6.35x)
intra_pred_z3_w4_16bpc_avx512icl: 21.0 ( 8.70x) 21.1 ( 7.53x)
intra_pred_z3_w8_16bpc_avx2: 48.7 (11.31x) 44.7 (10.18x)
intra_pred_z3_w8_16bpc_avx512icl: 30.8 (17.86x) 35.7 (12.76x)
intra_pred_z3_w16_16bpc_avx2: 102.1 (15.49x) 93.5 (14.72x)
intra_pred_z3_w16_16bpc_avx512icl: 59.3 (26.65x) 78.5 (17.53x)
intra_pred_z3_w32_16bpc_avx2: 218.2 (17.05x) 205.2 (15.89x)
intra_pred_z3_w32_16bpc_avx512icl: 116.8 (31.84x) 139.5 (23.38x)
intra_pred_z3_w64_16bpc_avx2: 486.0 (17.52x) 451.2 (16.63x)
intra_pred_z3_w64_16bpc_avx512icl: 322.4 (26.41x) 342.7 (21.89x)